usb keyboard dying at loader prompt

[Andriy Gapon]

I have a quite strange problem.
This is with 7-BETA amd64.
All of USB is out of kernel and is loaded via modules.
BIOS has "Legacy USB" enabled.
I have only a USB keyboard, no PS/2 port.

The keyboard works file in BIOS and for selecting boot device in boot0
menu. It also works in loader menu. If in the menu I select to go to
loader prompt then it works for about 5 seconds and then "dies" - no
reaction to key presses, no led change, nothing.
I haven't actually verified if the keyboard would still work if I stayed
in loader menu for longer than ~10 seconds.

This doesn't happen if USB is built into kernel.

Weird...

-- 
Andriy Gapon